81619460

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{313921}}^1$

素因数の和:313943

約数の個数: 24

約数和(自身を含む): 184586136

約数和(自身を除く): 102966676

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 313921, 627842, 1255684, 1569605, 3139210, 4080973, 6278420, 8161946, 16323892, 20404865, 40809730, 81619460]

約数ペア:

[(1, 81619460), (2, 40809730), (4, 20404865), (5, 16323892), (10, 8161946), (13, 6278420), (20, 4080973), (26, 3139210), (52, 1569605), (65, 1255684), (130, 627842), (260, 313921)]